The dissolution of the standard employment relationship since the 1970s has been paralleled by a destabilization of family relations. The paper, which is a slightly revised version of a plenary lecture at the 2008 Meeting of the German Sociological Association, discusses possible connections between the rise of more flexible labor market and family structures, and explores how they might tie in with the declining birth rate. The co-evolution of labor markets and family relations can be explained by both the attractions and the constraints of free markets. The current shift toward a new social policy aimed at increasing fertility is presented as an example of how expanding market relations and the uncertainty to which they give rise in personal life cause demands for state intervention. The logic seems remarkably similar to that of the current banking crisis, where the liberation of financial markets from traditional constraints and the progressive commodification of money have ultimately issued in irresistible pressures on the state to step in and restore the social commons of stable expectations and mutual confidence. In both cases, and perhaps generally, capitalism seems to imply a need for a public power capable of creating substitutes for social relations invaded by market relations and as a consequence losing their capacity to perform some of their previous functions.